One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,5)(7,8)(11,15)(14,16)(17,18)(19,27)(20,25)(21,23)(22,26)(24,28)(29,32)(30,31) involution — undirected(9,10)(11,14)(12,13)(15,16)(18,23)(19,28)(20,21)(24,32)(25,26)(27,31) involution — undirected(2,5)(6,8)(10,13)(14,16)(17,19,22,28)(18,24,26,27)(20,30,21,29)(23,31,25,32)(1,3,4,7)(2,6,5,8)(10,13)(14,16)(17,20,22,21)(18,25,26,23)(19,29,28,30)(24,31,27,32)(9,11,12,15)(10,14,13,16)(18,26)(23,25)(24,27)(31,32)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.